3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(0); $arr = array(); for ($i = 0; $i < 1000000; $i++) { $arr[$i] = $i; } foreach ($arr as $k=>$v) { $arr[$k][$k] = $v; }

preferences:
32.46 ms | 402 KiB | 5 Q